Wanted to like this - CAA MCK Micro Conversion Kit for Gen 1 Glock 17/19/19X/22/23/25/31/32/45

I really wanted to like the MCK G21. I love 45 caliber guns and I have more than I need. I wanted to be able to be a bit more accurate as I have gotten older. I will say that I shot groups tighter than I can with just a pistol. However, the MCK damaged my Glock 21 after only 50 rounds. It gouged both sides of the rear sight and put some gouges on the front of the gun as well. It is also VERY difficult to remove from the stabilizer. I can barely get it out, and I cut my hand during the removal. It might loosen up as it gets used, but I won't be using that much so I may never get there. If you don't care about damaging your Glock and you are fairly strong this might be OK for you, but not for me.